Overseaming-machine



S. W. AVIS.

OVERSEAMING MACHINE! APPLICATION FILED OCT. 19. 1915.

Patented Oct. 21, 1919.

m /\/\/\1\ w l\ 6 /i\ a W 8 0M III II ll INVENTEIR; W M QM HIS ATTORNEYS S. W. AVIS.

UVERSEAMING MACHINE.

APPLlCATION FILED OCT. 19. 1915.

Patented Oct. 21,1919.

2 SHEETS-SHEET 2.

HIS ATTIJ RNEYS THE coLuMB'm PLANQGRAPH co, WASHXNuluN, D. c.

SAMUEL W. Avrs,"or HARTFORD, continence-r, Assrenon. TO" TI-IE 1VERR:0WJVlAdI-TINE COMPANY, or HARTFORD, CONNECTICUT, A coRPoRATIoN or: GOIYINECTICU'Ef" To all whom it mag concern Be it known that I, SAMUEL WALTER Avis, acitizen of the UnitedStates, residing at Hartford, in the county ofHartfo'rd, State of Connecticut, have invented certain new and usefullmprovements in Overseaming- Machines; and I do hereby declare/the following to be a full, clear,'an d exact description of the same, reference being had to the accompanying drawings, forming "a part of this specification, and to the figures and letters of reference thereon. f

' This invehtion relates to sewing'machine guides of that type 1 employed. to facilitate the application of a strip upon fabricsfto which the strip is to be secured by stitching.

The term .strip is here used in a generic'sense to include ribbon, cord, tape or other similar material. I I

It is frequently desirable, as in finishing the edges of underwear, to include such a strip along certain portions of over stitching and exclude it along other portions; To

"do this a shiftable guide may be employed to advantage and the provision of such a guide, comprised of few parts, compact in form, and simple inop eration, is fthepri mar'yobject of thepresent invention. Other "objects of the invention will hereinafter appear.

i In the drawings accompanying andforrhing a part'of'the present specification I haveshown in detail one form of embodiment of my invention, adapted foruse in connection with a Merrow overedge sewing machine; It will be understood, however,

that the invention is not limited to the exact construction herein shown and described. Its scope is defined by the, appended claims.

In the drawings,.

Figure 1 is a front elevation of a part of the frame of a Merrow overedge sewing machine, showing the stitch forming mechanism, and in close, proximity thereto, my improved guide supported upon said frame.

Fig.2 is an end elevation of the machine shown in Fig. 1 with a cover removed. to disclose mechanism beneath thework plate. F ig. 3 is a sectional view on line 33 of Figs. 4 and 5 are views in isometrical pro- 'jection showing a movable part of the guiding 'deviceindifierentpositions and its relation to stitch forming elements.

Figs. 6 and 7* are sectional detail v ews the guide proper in longitudinal section and OVERSEAMING-MACHINE.

Specification of Letters Patent. I -'Pa,tente 1 0617,21, 1919,

Application filed October 19, 1915. Serial No. 56,714. i

showing the guide mechanism support del nism and its support as it would appear from that side which is, when the support is in place, contiguous to the machine frame, and l Fig. 9 is an enlarged detail view showlng certain other parts associated with said guide.

Like characters of reference designate slmllar'parts throughout the several views of the drawings,

The stitch forming'elements in the overedge' sewing machine illustrated comprise the usual eye pointedneedle v1, crochet, hook 2, supplemental thread carrier 3 and chaining finger 4. The needle 1 is',secured in the barf), which! is reciprocable in bearings 6 and 7 of the upper part or head 8 of the machine frame 9. ,Meansfo'r reciprocating and oscillating the crochet hook '2' include respectively tothe driving shaft 12jand the shaft 13. 'Gears '14 and 15 connect the two cam cylinders '10, and 11 so that shaft 12 will, whenrotated drive the cam cylinders and shaft 13 in unison therewith. In the 2, arm 21' is provided with a stud 23 and roll 24:, and arm 22 is provided with a Stud arm 20 is secured the shank of crochet hook 25 and roll 26. These roll-bearing studs extend respectively into grooves 27 and 28 in the respective'cam cylinders 10 and 11. By

virtue of the connections just described the I crochet hook will, upon rotation of'the cam cylinders, be actuated to cooperate with the needle and supplemental thread carrier in a manner well known .in this art to produce crocheted overedge stitches.

The stitches thus made may be spaced uniformly upon the edge of the fabric, producing. the plain crochet finish, or the stitches may be made in connected clusters thus producing. the shell stitch finish, the difference beingin the feeding of the fabric 80 a pair of cam] cylinders 10' and-11 secured which in the one case is preformed for each cycle of overedge stitching operations and in the othercase once for each several cycles of stitching operations.

It will be understood, however, that the present invention is not limited in its use to the particular kind of stitching or feeding shown but is intended for general use, though more especially for use in connection with some sort ofoveredge stitching.

Referring to Fig. 2 the feed mechanism of the'ma'chine illustrated will now be briefly described. The feed dog 30 is mounted for sliding movement in an arm 31 pivoted at 32. Projecting through a slot 33 in arm 31 is a stud 3 1 adapted to be engaged by the forked end of the lever 36 which is pivoted at its other end on shaft 37, the latter being secured in the machine frame. Adjustably secured to lever 36 is one end of a link .38 which at its opposite end engages an eccentric 39 on driving shaft 12. Each termittentl at intervals of several stitch forming cycles, it follows that the needle will penetrate the fabric repeatedly at or near one point thereby securing as many stitches at each point as there are stitch forming cycles during the intervals when the feed dog remainsbelow the work plate.

As shown, cam means are employed for raising the feed dog into operative position. The feed dog supporting arm 31 is provided with an adjustable shoe 43 having an inclined face l lwhich rests on a roller carried on a stud 46 at the end of a lever 47. The latter is mounted on a pivot L8 upon which it may be swung by a cam 19 secured to, and rotatable with a gear 50 which meshes with a pinion 51. Said gear 50 is mounted on a stud and the pinion 51 is secured to the driving shaft 12.

To properly hold the. work and to cooperate with the feed dog in effecting the feed the usual presser foot 55 is provided. The width of said presser foot may be increased to cover the extension 30 of feed dog 30 by securing to one side thereof by screw 56, (see Fig. 3) a laterally extending piece 57 having a depending car 58 which serves as a rear guide for the work. The work may be located and guided in front of V the presserfoot by a guide 59, which. as

usual, adjustably secured to the machine frame. 7

subject of the present invention will now be described.

Secured to the end of the machine frame adjacent to the stitch forming elements is a support 60 recessed as at 61 to form a housing to receive movable parts of the guide positioning mechanism. The guide proper comprises a tube as 63 which is shown as flattened, this form being particularly' adapted for guiding tape or ribbon into the edge finish 1n a flat condition. Pivotally mounted within the recess 61 of the support 60 on a stud 6 1 is acarrier 65 for tube 'Carrier 65 is'slott-ed'to receive the reduced end of a latch 66, said reduced end designated by 67' being pivoted to the carrier by a stud 68. Extending beyond the support 60, latch 66 terminatesat its outerend in a hooked finger grip 69, While aboutmi'dway of its length said latch is provided with separated notches 70 and 71 either of which may engage a latch pin 72. hen notch 70 engages. pin 72 (see Figs. 4 and '6) the carrier and itstubular guide will be positioned to lead thestrip 75 without the field of stitch formation. In order to position the carrier and guide to lead said strip within the field of stitch formation the latch is moved so that notch 71 engages pin 72, (see Figs. 5 and 7). When, in this last mentioned position it will be noted that.

the delivery end of the flattened guide tube 63, with respect to its width .is somewhat oblique to the plane occupied by the strip 7 5", when the latter is finally covered by stitching. The resulting cross-wise inclination of the strip as it emerges from the guide tube corresponds generally to the inclination of the crochet hook as it passes over the chaining finger above the strip. That is, the strip presents merelyits thickness in a plane substantially parallel with that of the path of the crochet hook thereabove and therefore maximum clearance is afforded between said crochet hook and strip. 7

Bearing against the back of latch 66 about opposite the pin 7 2 is a spring 76 held in a groove in support 60 by a cl amp block 77.

which is secured by a screw78,-the purpose of said spr ng being to hold the latch and parts associated therewith in either of the positions to which they may be adjusted. lllanipulation of the finger grip 69 to shift theguide and its carrier from the position in. which they are shown inFigs. 4c'an'd 6 to the position in which they are shown in Figs. 5 and 7 involves simply raising" the latch 66 againstthe pressure of spring 7'6 -until notch 70 idisengages pin:?72 and then spring 7 6 to engage notch 71 over pin 72.

A similar manipulation of latch 66v to that just described, with an intervening pull on the finger rasp; to engage shoulder against pin 2 will shift the guide and its carrier from the position in whichithey are shown in Figs. 5 and 7 to the position in which they are shown in Figs. 4: and 6. This construction of the guiding device which permits of the extreme simplicity of operation set forth, embodies. an arrangement, which confines all of the lmovements of the parts-to a single plane, thus reducing to a minimum the attention required in its use. Furthermore the transverse extent of the parts comprising the guiding device, with respect to the single plane in; which their movements take :place, is comparatively very slight, so that a viewdesirable to one operating the machine is not obscured,and inno way does the construction interfere with convenient. accessibility to adjacent parts of the machine.

' It is quite desirable that a slight tension be placed upon the strip as it is directedby its guide for inclusion with the stitches of an edge finish and furthermore that such tension be released when the guide is positioned to exclude the strip from the edge .finish. This may be accomplished in any convenient manner but I prefer to use a spring as 7 9 to efiect the desired result, said spring being secured by a screw in a channeled block 81, the latter being suitably mounted on the tube 63. Nearits free end said spring is bent to form a contact portion 82 adapted normally to extend into an opening 83 in tube 63 w and bear slightly against the strip therein. When the guide is shifted to exclude the strip from the stitching the extended free end 84 of spring 79 engages a stop-finger 85 by which said spring is lifted to carry the contact portion 82 away from the. strip. The stopfinger 85 may be mounted and held by a screw 87 which also serves to adjustably secure to the machine frame the guide 59 above mentioned. V

Having thus described my invention what I claim is,

1. In combination with stitch forming mechanism, a support, a carrier fulcrumed. in said support, a strip guide at one end of the carrier, a tension device mounted on the strip guide, a latch for adjusting thecarrier, and means for engaging the tension when the carrier is in one of its positions whereby the tension device will be moved from its normal position.

'2. In combination with stitch forming mechanism, a support having separated side walls,-a carrier 'fulcrumed' on a pivot 6X7 BEE-lldllIgLbGtWBQn: said side walls, a strip guide at one endrfof'saidcarrier, a; latch pivot-ed at the other end of the carrier, means engageable by the latch for-holding the carrier in different os1t1ons, and means -fori' normally holding the latch in engage-- :ment with said latch engage'able means};

3. In a :sewing machine, in combination withstitch forming elements, a work plate,

strip guide carrier support recessed to Z the direction of the feed.and-coinciding with the path of the. needle to thereby change the proximity of the strip guide to the work :plate, an actuating latch yassociated with the carrier within. the housing, and.

means. for engagingathe latch to hold itrin different positions.-

4:. In combination thereof will be in constant substantial alinement with the depending guide flange of the presser foot, and? means for. moving said stripguide whereby a strip carried by the guide may be directed within or with 'out the field of stitch formation.

fixed position on the machine frame above the work plate, a carrier fulcrumed in the support, a strip guide on the carrier, and a latch pivoted to the carrier, the carrier ful'-' crum and latch pivot beinginsubstantial parallelism with each other and with the with stitch forming niechamsmyawork: plate, a feeddog: havwork engaging surface of the. work plate, J

whereby the strip guide may be swung vertically toward and from the work plate.-

6. In a. sewing machine, in combination,

a work plate, stitch forming elements in cluding a crotchet hook operable in a path extendlng over the work plate in a plane oblique thereto, a fiattened strip guide hav ing the major transverse axis of-its delivery end substantially in. parallelism with that part of the crotchet'hook path which overlies the work plate,"and means above the work plate for movably supporting the strip guide, whereby the strip guide may be actuated to move its deliveryend in front of and below the crotchet hook path or above and behind the crotchet hook path.

7 In a sewing machine, in combination.

a work plate, a needle operable in a path extending aboveand below the work plate,

an implement movable in a path extend ing over the work plate in a plane oblique thereto to cooperate with the needle, a fiattened strip guide having the major transverse axis of its delivery end substantially in parallelism with that part of the implement path which overlies the work plate, a

tension device associated with the strip guide means for movably supporting the strip guide whereby the latter may be actuated} to move its delivery end above and below the implement path respectively on opposite sides thereof, and means for engaging the tension device to render it in elfective. r

8. In a sewing machine, in combination with stitch forming elements, a work plate, a strip guide carrler support mounted in fixed position on the machine frame above the work plate, a strip guide, a carrier for the strip guide movably mounted in the support to move in parallelism to a plane extending in the direction of the vfeed and co- Oopies of this patent may be obtained'tor five cents each, by addressing Washington, 1). c V E inciding with the path o f the needle to thereby change the proximity of the strip 7 .guide :to the work plate, and a carrierwac' tuating latch movable in parallelism to the plane of movementiof the carrier.

. '9. Ina sewing IIlflGhlJlB, in 'icombinatlon,

a work plate, stitch forming elements ineluding an implement operable in a path extending :over the work plate in a plane oblique thereto, a flattened strip guide having the major transverse axis of its delivery end substantially in parallelism with that part of the implement path which overlies the work plate, and means for movably supporting the strip guide whereby it may be ac p SAMUEL W. AVIS.

Witnesses: v r

i F. W, SPELLMAN,

ANDERSON;

the -"Commissioner of Patents, 

